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Ramie A bast fiber, similar to flax, taken from the stalk of a plant grown in China.
Raschel Knit A warp knitted fabric in which the resulting knit fabric resembles hand crocheted fabrics, lace fabrics, and nettings. Raschel warp knits contain inlaid connecting yarns in addition to columns of knit stitches.
Rayon A manufactured fiber composed of regenerated cellulose, derived from wood pulp, cotton linters, or other vegetable matter. Today, various names for rayon fibers are taken from different manufacturing processes. The two most commonly used production methods for rayon are the cuprammonium process and the viscose process.
Repellency The ability of a fabric to resist such things as wetting and staining by water, stains, soil, etc.
Resiliency The ability of a fabric to spring back to its original shape after being twisted, crushed, wrinkled, or distorted in any way.
Resin The name commonly applied to synthetic chemical compounds polymerized on the fabric or yarn to give wash-and-wear and durable press properties, crush resistance, dimentional stability, and hand to fabrics.
Resin-Treated A finishing process associated with the application of synthetic chemical compounds to the fabric to provide wrinkle-resistance, wash-and-wear characteristics, or an improved hand.
Rib Knit A basic stitch used in weft knitting in which the knitting machines require two sets of needles operating at right angles to each other. Rib knits have a very high degree of elasticity in the crosswise direction. This knitted fabric is used for complete garments and for such specialized uses as sleeve bands, neck bands, sweater waistbands, and special types of trims for use with other knit or woven fabrics. Lightweight sweaters in rib knits provide a close, body-hugging fit.
Rib Weave One of the plain weave variations, which is formed by using: 1) heavy yarns in the warp or filling direction, or 2) a substantially higher number of yarns per inch in one direction than in the other, or 3) several yarns grouped together as one. Rib fabrics are all characterized by having a slight ridge effect in one direction, usually the filling. Such fabrics may have problems with yarn slippage, abrasion resistance, and tear strength. Examples of this construction include broadcloth, poplin, taffeta, faille, shantung, and cord fabric.
Ribbon A fillet or narrow woven fabric of varying widths, commonly one-quarter to three inches, having selvage edges, chiefly or rayon, silk, or velvet, and used for braiding, decoration, trimmings, etc.
Rickrack Flat braid in a zig-zag formation. Made from several types if fibers, it is used for many kinds of trimming on apparel.
Ring Spinning A system of spinning, using a ring spinning frame that drafts the roving, twists the yarn, and winds it on the bobbin continuously and simultaneously on one operation. Modern ring frames are suitable for spinning all counts up to 150s.
Rip-stop Nylon A lightweight, wind resistant, and water resistant plain weave fabric. Large rib yarns stop tears without adding excess weight to active sportswear apparel and outdoor equipment such as sleeping bags and tents.
Rise The length of trouser from the top of the waistband at the fly opening, around the crotch, to the top of the back waistband at the center.

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